<template>
    <div class="box">
        <el-row class="row">
            <el-col class="col">
                <el-menu :default-active="activeNav" class="el-menu-vertical-demo" @open="handleOpen"
                    @close="handleClose" background-color="#545c64" text-color="#fff" active-text-color="#ffd04b">
                    <el-submenu index="1">
                        <template slot="title">
                            <i class="el-icon-location"></i>
                            <span>导航一</span>
                        </template>
                        <el-menu-item-group>
                            <el-menu-item index="1-1" @click="changeMain('/1-1')">选项1</el-menu-item>
                            <el-menu-item index="1-2" @click="changeMain('/1-2')">选项2</el-menu-item>
                            <el-menu-item index="1-3" @click="changeMain('/1-3')">选项3</el-menu-item>
                            <el-submenu index="1-4">
                                <template slot="title">选项4</template>
                                <el-menu-item index="1-4-1" @click="changeMain('/1-4-1')">选项1</el-menu-item>
                            </el-submenu>
                        </el-menu-item-group>
                    </el-submenu>
                    <el-menu-item index="2" @click="changeMain('/2')">
                        <i class="el-icon-menu"></i>
                        <span slot="title">导航二</span>
                    </el-menu-item>
                    <el-menu-item index="3" @click="changeMain('/3')">
                        <i class="el-icon-document"></i>
                        <span slot="title">导航三</span>
                    </el-menu-item>
                    <el-menu-item index="4" @click="changeMain('/4')">
                        <i class="el-icon-setting"></i>
                        <span slot="title">导航四</span>
                    </el-menu-item>
                </el-menu>
            </el-col>
        </el-row>
    </div>
</template>

<script>
export default {
    created() {
        this.activeNav = this.$route.fullPath.slice(1)
    },
    data() {
        return {
            activeNav: ''
        }
    },
    methods: {
        handleOpen(key, keyPath) {
            console.log(key, keyPath);
        },
        handleClose(key, keyPath) {
            console.log(key, keyPath);
        },
        changeMain(path) {
            this.$router.push(path)
        }
    }
}
</script>

<style scoped>
.row {
    height: 100%;
    border: 0;
    margin: 0;
}

.col {
    height: 100%;
    border: 0;
    margin: 0;
}

.el-menu-vertical-demo {
    height: 100%;
    border: 0;
    margin: 0;
}
</style>